Historical Climate Data

Growing Season Summary
Station: 479304 WINTER 5 NW, WI

Growing Degree Day Averages
Derived from 1971-2000 Data

 

Element JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
GDD
Base 40		 0 1 17 118 408 654 811 743 446 166 21 0 3286
GDD
Base 45		 0 0 6 60 275 505 657 588 304 83 7 0 2412
GDD
Base 50		 0 0 1 27 167 361 502 434 184 35 2 0 1661
GDD
Base 55		 0 0 0 11 89 230 349 285 96 12 0 0 1039
GDD
Base 60		 0 0 0 4 40 120 207 155 43 3 0 0 554
MGDD*
Base 50		 0 1 15 95 270 407 516 464 266 111 14 0 2101

*Modified Growing Degree Days: Base 50 Ceiling 86.

Growing Season Summary
Derived from 1971-2000 Averages

  Date of Last Spring Occurrence Date of First Fall Occurrence
Base
Temp
°F		 Median Early 90% 10% Late Median Early 90% 10% Late
32 5/29 4/30 5/16 6/11 6/22 9/18 8/16 9/02 10/02 10/03
30 5/24 4/28 5/09 6/08 6/22 9/23 9/03 9/09 10/04 10/11
28 5/17 4/23 5/03 5/27 6/22 10/02 9/20 9/23 10/10 10/22
24 5/06 3/25 4/12 5/17 5/27 10/10 9/23 9/25 10/27 11/04
20 4/16 3/25 4/02 5/02 5/27 10/26 10/06 10/11 11/12 12/01
16 4/09 3/24 3/26 4/23 5/27 11/03 10/11 10/20 11/16 12/01

Length of Growing Season (Days)
Derived from 1971-2000 Averages

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 111 82 92 126 145
30 121 90 109 142 147
28 136 94 126 152 159
24 162 135 141 190 194
20 192 170 172 213 225
16 208 172 189 223 250